mopar aluminum intakes

The only two intakes that I know for sure that were made by Edelbrock and appeared as a stock item on 60`s or 70`s Mopars were the 69, 440 6 pack intake and the 70 340 6 pack intake. The Edelbrock company was unable to supply enough 440 6 pack intakes for the 1970 year so Chrysler had their own cast in iron. The LD-340 is basically a copy of the 68-340 factory intake in aluminum. I may be wrong about this but I believe the LD4B was designed for the 273/318 engine with smaller ports than its brother the LD-340. HTH.